Sheet-metal-bending dies



Feb. 5, 1924.

J. HUBER SHEET METAL BENDING DIES 2 Sheets-Sheet 1 Filed Jan. 19. 1922' F IE5 JNWTOR.

2 4 5 9 M. m u 7 0 Z 9 q z u g 1115.2. 5 W 2 m z 3 8\ m m F Feb. 5, 1924; 1,482,927

- J. HUBER SHEET METAL BENDING DIES 1K Filed Jan. 19. 1922 2 Sheets-Sheet 2 FIG. a r

50 6 a Z6 i 279 L 5 l4 tain new Patented Feb. 5, 192%.

JOHN HUBER, OF BELLWQOD, PENNSYLVANIA.

SHEET-METAL-BENDING DIES.

Application filed January 19, 1922. Serial No. 530,306.

To all whom it may, concern.

Be it known that I, JOHN HUBER, a citizen of the Republic of Poland, residing at Bellwood, in the county of Blair and State of Pennsylvania, have invented cerand useful Improvements in Sheet-Metal-Bending Dies, of which the following is a specification.

My invention relates to the art of bending sheet or plate metal between suitably formed dies. It has in view to utilize the main frame of a power actuated shear, punch, press, or other similar machine, by providing suitable dies and supporting and adjusting mechanism, capable of attachment to such a machine, and adapted to operate in the manner hereinafter described. The utilization of the invention in this manner enables the operator to perform a variety of operations on a single standard machine, at great economy of original cost and shop space, and within a considerable range as to size and variety of the resulting product. i

In the drawings, illustrating certain preferred adaptations of the invention:

Figure 1 is a partial view in side elevation of a standard punch, shear, or press, equipped with the necessary mechanism for Hanging a circular boiler plate or head;

Fig. 2 is an enlarged detail view in side elevation showing the initial operation in partly flanging boiler plate;

Fig. 3 is a similar view showing the partly bent periphery as it is subjected to the final fianging operation;

Fig. 42 is a similar view, showing the final flanging operation and the adjustable pivotal supporting mechanism for the plate;

Fig. 5 is a sectional plan view on the line VV of Fig. 1;.

Fig. 6 is a sectional detail view on the line VIVI of Fig. 5; s

Fig. 7 is a view in front elevation of the pressing dies and supporting mechanism, partly broken away. as used for curving shapes;

Fig. 8 is a detail view showing the dies as used in curving an angle or other shape, the dies being open;

Fig. 9 is a similar view showing the angle between the dies asrlosed. to bend it to circular form;

Figs. 10 and 11 are detail views similar to the working area of Fig, 1, showing a.

modified construction of pressure rods and shoes therefor;

Fig. 12 is an enlarged detail view in perspective, showing the pivoted shoe for the pressure rod.

In the drawings, 2 is the main frame or housing of a standard punch, shear, or press. having the usual anvil block or base 3 and head 4. "Within the head 4 is usually mounted a cam or eccentric-actuated reciprocable head or base'to which is attached the punch or shear of common use. The latter in the present case, is replaced by a block 5 adapted to be :raised and lowered by the actuating mechanism in connection with the customary clutch, for intermittent operation. Block 5 is provided with a centrally arranged temper screw 6 which is connected by its swivel head 7 and retaining plate 8 with the reciprocable die block 9. A supplemental pressing die 10 is removably secured to block 9 by a dove-tail 11, set-screw, or other suitable means for downward bending action against the metal.

Upon the anvil base 3 of the frame is secured a bracket 12. fitting its standard construction, and having at its lower por tion a forwardly extending bracket support 13. An anvil block 14 is laid upon support 13 and fixedly located in place by a dovetail or other rib and groove 15 to centralize it with relation a the pressing die 10.

As shown, the lower face of die 10 and upper face of block 142 are parallel but at an angle to the horizontal, corresponding to the degree of preliminary bending, and the front face 16 of bracket 12 is at right angles to these faces. providing the proper ninety degree angle for the angle bending operation. hereinafter described.

The circular plate a to be flanged is pivotally mounted at its center by a hole upon centering pin 17 extending upward ly from a block 18 which is slidably mounted upon a pair of supporting angle or other bars 19 secured, hvbolts 20 to the bracket projection 13 and supported in horizontal position by the braces 21. bolted to the bars 19 and to the front lower frame of the punch 2. as shown.

, The centering block 18 is slidably and adiustably mounted by registering grooves on the supports 19 and fixedly clamped in place when adjusted by a washer plate 22 bolt 23. Block 18 is accurately art justed to the exact position desired for pivotal moimting of the plate a by means of a temper screw 6 rotatably mounted in rear bearing 7 and front bearing 9 supported underneath bars 19. Screw e engages a threaded nut h of the block 18 and has a squared terminal i for turning. By this means. the block 18 and its pivoting pin 17 may be very accurately set to the desired position for varying diameters of plates.

Reciprocable die block 9 is slidably n1ounted against a rear guide block 24: and between side angle guides 25 thereof, by which the block 9 is retained. and guided in its move ment. A plate 26 is bolted to the upper face of bracket 12 with a middle opening for the reciprocable die block 9'and extends forwardly to provide guidin bearings fora plurality of holding pin 2". These pins,

preferably square, are connected by upper terminal eyes and a common transverse bolt 28 with supporting lugs 29 extending for-- wardly from the reciprocable block 5. Each pin is preferably made of a lower and an upper section, threaded at their inner ends and connected by a turn-buckle 30 for accu rate adjustmentas to length.

In Figs. 10,11 and 12 I show a preferred construction of pressure pin 27 provided at its lower end with a bearing shoe 27 pivotal-lyconnected at 27. The shoe is adapted to flexibly fit by its broad under face against the face ofthe plat-e. whether it is horizontal or inclined, and with very greatly increased bearing effect, and will not'mark or score the surface.

In operation, a sample templet is first set between the dies which are then adjusted to make the preliminary bend. as in Fig. 1. The pins 27 are also adjusted, the outer pins being preferably slightly longer than the center one to ensure pressing the plate downwardly towards anvil 14.. The under face of the pressing die 10 is either flat for ordinary Hanging, or is curved. as in Fig. 7,

' to ensure ample bending action at each successive operation although the active face of the die may, of course, be left straight if preferred.

After such adjustment. a flat circular plate a is centered upon the pin 17 and its periphery is subjected to a single pressing 0peration. The plate is then shifted annularly enough for the next lateral sectional operation, and this is continued throughout the entire circumference. Thereafter, braces 21 are removed, bars 19 are lowered to the position of. Fig. 4, and substitute braces 21 are substituted. In such position, bars 19 are at right angles to the active faces of pressing dies 10 and 14 and parallel with face 16, so as to locate the plate a properly for final right angle flangin'g, as in Fig. 3.

A similar series of operations are then performed, further bending the flange to the final. form 7) all around, when the plate may then be removed. For the secondary series of operations. I may substitute a secondary set of pressing pins 27 having chamfered terminals for sloping engagement with the plate, or preferably use the form shown in Figs. 10, 11 and 12. p

The pivoted shoes 27* easily adapt them selves to any varying angle of the plate, and the turn-buckle 30 provides for accurate adjustment of length. The advantage of the latter form is that it provides for operation on the plate at varying angles with the same set of pressure pins.

Tn flanging the circular plates a as above described, the working faces of the dies 10 and ii are preferably flat and parallel for best results. In forming angles or other shapes in ring or curved form, the faces of the dies 10 and 14 are conformably curved as shown in Fig. 7, and the blank is subjected-to a series of successive operations for pressing to the curve of desired radius.

It will be understood that in Hanging circular plates, the change of angle of the supports 19 may be made between each complete treatment, or, if a number are being operated on, they may all be partially flanged over, and the centering block then changed before the last treatment, with least loss of time.

The construction and operation of the invention will be readily understood and ap preciated from the foregoing description. The several parts are comparatively few and simple, of cheap construction, and may, of course, be made of the proper size, degree of angle, or otherwise modified by the skilled mechanic, to adapt the machine to the work in view. All such changes are to be understood as withinthe scope of the following claims.

What I claim is:

1. In flanging u'iechanisiu, the combination with a supporting base and an upper rcciprocable power driven head. of an anvil block mounted on the base having a bending edge and a continous plane backwardly and downwardly sloping face extending therefrom, a co-acting die having a similar face mounted on the reciprocable head, and means for horizontally supporting a plate with. its edge. portion extending across the anvil block.

2. In Hanging mechanism. the combination with a supporting base and an upper reciprocable power driven head. of an. anvil block mounted on the base having a bending edge and a continuous plane hackwardly and. downwardly sloping face extending therefrom. a co-acting die having a similar face mounted on the reciprocable head. and an adjustable supporting table having a centerin support for a plate miranged to hold the edge portion of the plate horizontally over the anvil block for partial flanging by the reciprocable die and when adjusted to inclined position to hold the partially flanged portion thereover for further flanging, substantially as described.

In combination with a supporting base and a reciprocable power driven head, a bracket mounted on the base provided with a. sloping rear face and a supporting anvil die having a face extending at an angle thereto, a co-acting pressing die having a face'parallel with the face of the anvil die, a supporting die block therefor, guiding means for said block, a temper screw ad just-ably connecting the block with the reciprocable head, and means connected with and movable by the reciprocable head for clamping the article being acted upon be tween the anvil die and the pressing die.

4. I11 combination with a supporting base and a reciprocable power-driven head, a bracket mounted on the base provided with a stationary incline faced supporting anvil die, a co-acting incline faced pressing die adjustably secured to the reciprocable head, and co-operating pressing holders carried by the reciprocable head and adapted to hold the blank against the edge of the stationary die.

5. In combination with a supporting base and a reciprocable power-driven head, a bracketmounted. on the base provided with a sloping rear face and a supporting die having a face extending at right angles thereto. a co-acting pressing die having faces parallel with said faces, a supporting base therefor, guiding means for said base, a temper screw adjustablv connecting the base with the reciprocable head, a guide plate mounted on the base having holes therein, and pressing holders carried by the recipro cable head extending through said holders adapted to hold the blank against the stationary die.

6. In combination with a lower support ing base having a supporting incline faced anvil die and a guide plate, and an upper reciprocable head having a co-acting incline faced pressing die; a plurality of pressing holders removablv connected with the reciprocable head extending through the guide plate and provided with length-adjusting mechanism adapted to hold the blank against the edge of the stationary die.

7. The combination with the frame of a standard punch or the like having a lower anvil base and an upper reciprocable power driven member, of an incline faced anvil block mounted on the anvil base, an upper pressure die having a co-acting inclined face, means for adjustably mounting the pressure die on the reciprocable member, guiding means for the pressure die, and pressure exerting holders for the blank connected with the reciprocable member adapted to hold the blank against the edge of the anvil die.

8. In combination with a lower base and an upper reciprocable power actuated head, a supporting anvil die carried by the lower base having abending edge and a rearwardly sloping face, and apressing die carried by the upper head having a co-acting similar face; a supporting framework secured to the lower base provided with an adjustable centering block and pivoting pm for the blank adapted to support it across the edge of the anvil die for intermittent lateral adjustment and bending action thereon.

9. In combination with a lower base and an upper reciprocable power actuated head, a supporting anvil die carried by the lower base having a bending edge and a rearwardly sloping face, and a pressing die carried by the upper head having a co-acting similar face; a supporting framework secured to the lower base provided with a slidably mounted block having a centering and pivoting pin, and means for securing the block in varying positions whereby to locate the edge portion of different size circular blanks across the edge of the anvil die.

10. In combination with a lower base and an upper reciprooable power actuated head, a supporting anvil die carried by the lower base, and a pressing die carried by the upper head; a supporting framework secured to the lower base provided with a slidably mounted block having a centering pin and pressure devices connected with the reciprocable head adapted to engage the edge portion of the blank to hold it against the anvil die, a temper screw journalled in the framework and having threaded engagement with the block.

11. In combination with the lower base and an upper reciprocable power actuated head, a supporting anvil die carried by the lower base, and a pressing die carried by the upper head; a supporting framework secured to the lower base provided with a slidably mounted block having a centering pin, a temper screw rotatably mounted in the framework and having operative connection with the block, and variable length pressure holders mounted on the reciprocable head adapted to engage the blank.

12. The combination with the frame of a standard punch or the like having a lower anvil base and an upper reciprocable power driven member, of a bracket mounted on the base having a forwardly sloping face and a supporting die at right angles thereto, an upper die having corresponding faces with means for adjustably mounting it upon the reciprocable member, means for guiding said die, and pressure holders adapted to engage the blank adjustably mounted on the reciprocable member.

18. In fianging mechanism, the combination with a supporting base and an upper reciprocable power driven head, of an anvil block mounted on the base having a bending I edge and a rear sloping face, a eo-acting bending die mounted on the reeiprocable head, means for supporting a plate with its edge portion extending across the anvil block, and holding pins connected with and operable by and in conformity with the reciprocable head adapted to engage the plate in front of the bending edge and press it thereon.

14. In flanging mechanism, the combination with a supporting base and an upper reciprocable power driven head, of an anvil block mounted on the base having a bending edge and a rear sloping face, a co-acting bending die mounted on the reciprocable head, means for supporting a plate with its edge portion extending across the anvil block, and holding pins connected with the reciprocable head adapted to approach the anvil block in conformity with the movement of the bending die and to engage the Y plate in front of the bending edge and press it thereon.

In testnnony whereof I hereunto aflix my signature.

JOHN HUBER. 

